EP1871541B1 - Masking article and method of masking a substrate to be coated - Google Patents

Masking article and method of masking a substrate to be coated Download PDF

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Publication number
EP1871541B1
EP1871541B1 EP06750543A EP06750543A EP1871541B1 EP 1871541 B1 EP1871541 B1 EP 1871541B1 EP 06750543 A EP06750543 A EP 06750543A EP 06750543 A EP06750543 A EP 06750543A EP 1871541 B1 EP1871541 B1 EP 1871541B1
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EP
European Patent Office
Prior art keywords
masking
masking article
article
substrate
adhesive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP06750543A
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German (de)
English (en)
French (fr)
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EP1871541A1 (en
Inventor
Kevin M. 3M Center ELIASON
Jeffrey R. 3M Center JANSSEN
Larry R. 3M Center LAPPI
Larry A. 3M Center MEIXNER
Michael J. 3M Center MOSZER
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3M Innovative Properties Co
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3M Innovative Properties Co
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Publication date
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Priority to PL06750543T priority Critical patent/PL1871541T3/pl
Publication of EP1871541A1 publication Critical patent/EP1871541A1/en
Application granted granted Critical
Publication of EP1871541B1 publication Critical patent/EP1871541B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
    • B05B12/26—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities
    • B05B12/265—Masking elements, i.e. elements defining uncoated areas on an object to be coated for masking cavities between a door and a post, e.g. foam strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/16—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling the spray area
    • B05B12/20—Masking elements, i.e. elements defining uncoated areas on an object to be coated
    • B05B12/24—Masking elements, i.e. elements defining uncoated areas on an object to be coated made at least partly of flexible material, e.g. sheets of paper or fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/28—Metal sheet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24777—Edge feature

Definitions

  • the present invention relates generally to masking articles and methods of masking a substrate as disclosed e.g. in document WO99/46056 .
  • the invention particularly relates to masking articles and methods of masking substrates in automotive applications.
  • masking materials used to mask or cover a surface during automotive painting operations are known.
  • conventional masking tapes or adhesive foams may be used to mask an area when applying paint to an adjacent area.
  • a common treatment used in vehicle finishing comprises an initial coating of a sealer (or primer) material, followed by a second layer of material comprising a color coating, followed by a third layer of material comprising a clear coat. It is often desirable that initial coating layers comprising the primer or sealer material be completely covered by successive coatings to avoid the appearance of a hazy, discolored band of material in the final painted surface. A painted surface containing such a defect must be sanded and/or spot painted, which adds time and cost to a repair job.
  • the present disclosure relates to a profiled masking article and method of masking a substrate to be treated or painted that provides a feathered or soft edge between painted and unpainted areas.
  • the masking article described herein may be used as a single strip, or as multiple strips, placed side by side, wherein a strip is removed between treatments of different types. This allows successive treatment layers to completely cover previous layers, thus avoiding defects resulting from exposed layers of material.
  • the present disclosure is directed to a masking article comprising:
  • the present disclosure is directed to a masking article comprising an elongate body, said body having a top surface, a bottom surface and at least two lateral surfaces, wherein at least a portion of said body comprises an adhesive material made by a casting process; and a top portion connected to the body along at least one surface, said top portion having a microreplicated surface.
  • the present disclosure is directed to a method of masking a substrate having a surface to be masked and a surface to be treated comprising applying at least one masking article to the substrate, said article comprising an elongate body, said body having a top surface, a bottom surface and at least two lateral surfaces, said body further comprising an adhesive, and a top portion connected to the body along at least one surface, applying a first coating of material on the substrate; removing said at least one masking article from the substrate; and applying a second coating of material to the substrate.
  • PSA Pressure Sensitive Adhesive
  • PSAs typically include materials (e.g., elastomers) that are either inherently tacky or that are tackified with the addition of tackifying resins. They can be defined by the Dahlquist criteria described in Handbook of Pressure Sensitive Adhesive Technology, D. Satas, 2nd ed., page 172 (1989 ) at use temperatures. This criterion defines a good PSA as one having a 1 second creep compliance of greater than 1x10 -6 cm 2 /dyne. Alternatively, since modulus is, to a first approximation, the inverse of compliance, PSAs may be defined as adhesives having a modulus of less than 1x10 6 dynes/cm 2 .
  • PSA room temperature storage modulus within the area defined by the following points as plotted on a graph of modulus versus frequency at 25° C: a range of moduli from approximately 2x10 5 to 4x10 5 dynes/cm 2 at a frequency of approximately 0.1 radian/second (0.017 Hz), and a range of moduli from approximately 2x10 6 to 8x10 6 dynes/cm 2 at a frequency of approximately 100 radians/second (17 Hz) (for example, see FIGS. 8-16 on p. 173, Handbook of Pressure Sensitive Adhesive Technology, D. Satas, 2nd ed., (1989 )).
  • the present disclosure relates to a profiled masking article and method of masking a substrate to be treated or painted that provides a feathered or soft edge between painted and unpainted areas.
  • the masking article described herein may be used as a single strip, or as multiple strips, placed side by side, wherein a strip is removed between treatments of different types. This allows successive treatment layers to completely cover previous layers.
  • the masking articles described herein may be used in any masking operation, the masking articles are particularly well suited for masking the gaps between adjacent panels of an automobile, such as a door jamb.
  • a typical procedure used in automotive repair operations to treat a substrate such as a surface of a vehicle to be partially painted includes applying an initial coating of a primer/sealer to the substrate, followed by a color coating (or paint layer), followed by a clear coat layer.
  • a primer/sealer to the substrate
  • a color coating or paint layer
  • a clear coat layer to a substrate
  • Fig. 1a a prior art masking method is depicted wherein the use of a single piece of masking material 17 used to mask a substrate 28 results in the first primer/sealer layer 22 penetrating furthest in toward the masking material, with each subsequently applied layer (24 and 26) penetrating to a lesser extent.
  • Fig. 1b illustrates the coating profile obtained when the layers of primer/sealer 22, color coat 24, and clear coat 26, are applied to a substrate to be painted 28, when masked with conventional masking tape 19.
  • conventional masking tape 19 results in a high edge profile or meniscus 18, which typically must be sanded and repainted to achieve a smooth finish.
  • Masking article 10 has a generally elongate body portion 12 and a top portion 14 attached to a surface of the body portion 12.
  • the body portion 12 of the masking article is made, at least in part, of an adhesive material.
  • the body portion 12 is made entirely of an adhesive material and formed by any number of suitable processes, including a casting process, hot melt process and the like.
  • the body portion of the masking article may take on a variety of suitable shapes including, but not limited to, polygonal shapes such as square, rectangular, triangular, and pentagonal. Suitable shapes also include shapes having curved or arcuate surfaces including, but not limited to, circular, oval, and elliptical shapes. Suitable shapes additionally include shapes having both arcuate portions and non-arcuate portions, such as, by way of non-limiting example, parabolic, or obround shapes.
  • FIG. 3a shows masking article 30 having a body portion 42 with a square cross-section.
  • Masking article 32 is shown in FIG. 3b with body portion 44 having a trapezoidal cross-section.
  • FIG. 3c shows a masking article 34 having a body portion 46 with a parabolic cross-sectional shape, and no top portion. It should further be appreciated that the cross-sectional shape of an elongate masking article may have more than one cross-sectional shape along its length.
  • the top portion 14 of the masking article is generally planar, however, it should be appreciated that the top portion may take the form of any number of suitable shapes, for example, the top portion may be formed to follow the contour of the body portion, or may take the form of any suitable shape, by way of non-limiting example, concave, convex, or corrugated.
  • the top portion may be made of any suitable material.
  • the top portion 14 is made of a thermoplastic material, which is either laminated or formed as an integral piece with the body portion 12.
  • the top portion 14 contains a microreplicated surface.
  • microreplicated surface could enable the masking article to be wound directly upon itself for storage and shipment without the use of a release liner.
  • a microstructured surface as used herein is defined as a surface having three dimensional surface features.
  • a microreplicated surface as used herein, is defined as a type of microstructured surface made by impressing or casting the surface features with a tooled surface having a negative impression of the microreplicated pattern.
  • a microstructured surface may be made by a tool such as those described by U.S. Patent No. 6,824,378 (King et al. ). Types of microstructured surfaces include, but are not limited to, pyramids, grooves, cones, prisms, spheres, and ellipsoids.
  • Various microstructured surfaces are described in U.S. Patent No. 6,315,851 (Mazurek et al. ).
  • the top surface of the masking article comprises a cross-hatched pattern of grooves.
  • Materials suitable for making the top portion of the masking article include a broad range of natural and synthetic materials.
  • materials include, but are not limited to, polyolefins such as polyethylene, polypropylene, polybutene, or polypentene; polyesters such as polyethylene terephthalate, polybutylene terephthalate, or polyethylene naphthalate; polyamides, polythioethers, polysulfones, polyurethanes, polyethersulfones, polyimides, polyvinylalcohols, polyvinylchloride, and combinations of these.
  • the dimensions of the masking articles are about 3/16-inch (4.76 mm) wide by about 25 mils (0.64 mm) thick.
  • the length of the articles may vary depending on the application, and may be provided in pre-cut segments separable by a line of weakness, perforation, or other suitable means.
  • Materials suitable for making the body portion of the masking articles described herein include a broad range of natural and synthetic materials.
  • the body portion of the masking material is made entirely of a pressure-sensitive adhesive material.
  • the body portion is primarily composed of a non-adhesive material, with a layer of PSA material to adhere the article to a substrate.
  • suitable pressure-sensitive adhesive materials include, but are not limited to, polyolefins, acrylate polymers, natural and synthetic rubbers, silicone polymers, polyurethanes, poly-(vinyl ethers), and styrene block copolymers.
  • the PSA material may be inherently tacky, or tackifiers may be added to the base material to form the PSA.
  • Useful tackifiers include, for example, rosin ester resins, aromatic hydrocarbon resins, aliphatic hydrocarbon resins, and terpene resins. Other materials can be added for special purposes, including, for example, oils, plasticizers, antioxidants, ultraviolet ("UV") stabilizers, hydrogenated butyl rubber, pigments, and curing agents. Further disclosures of useful PSAs may be found in WO 2003017899 A and U.S. Patent No. 5,654,387 .
  • the PSA material may further contain elastomeric or rigid microspheres such as those described in WO 00/06637 .
  • PSA material used creates minimal adhesion buildup after being applied to a substrate, even after exposure to elevated temperatures. It is desirable for the adhesive material used to peel cleanly from the substrate without either delaminating the substrate or leaving an adhesive residue. Also, this characteristic assists in the ability of the masking material to be wound upon itself without the need for a release liner.
  • One method of making such an adhesive is to cure or cross-link the adhesive material before it is used, as further described below. Other methods are described in U.S. Patent No. 4,599,265 .
  • masking articles described herein may be made by any number of processes such as extrusion, injection molding, die-casting or other suitable processes for molding or forming an article.
  • masking articles as described herein are made by extruding the body portion onto a web of material, which forms the top portion of the masking article.
  • several body portions may be extruded in parallel onto a web of material, with individual articles subsequently cut from the larger web, for example, by a roll converting process.
  • both the top portion and body portion of the masking article may be formed simultaneously by an extrusion or co-extrusion process.
  • the top portion of the masking article may be laminated onto the extruded body portion of the masking article.
  • the body portion of the masking article is made by a casting process as described in U.S. Patent Publication No. 2003/0194526 .
  • the process provides for the continuous production of viscoelastic articles, such as pressure-sensitive adhesives, in which a composition that is curable to a viscoelastic material is coated onto a first release surface of a production tool wherein the first release surface is reusable and configured to permit continuous production of the material.
  • a substrate including a second release surface is contacted with the viscoelastic material that has been coated on to the first release surface.
  • the viscoelastic material may be partially or completely cured while in contact with the first and second release surfaces.
  • the second release surface is a sheet of material making up the top portion of the masking articles.
  • Suitable configurations for the production tool include, for example, a belt, a drum or a roller.
  • the production tool may be constructed from a release material in order to provide sufficient release characteristics such that it can promote the release of material from the tool.
  • Suitable release materials include, but are not limited to, silicone and fluorocarbon polymers.
  • the tool may be constructed of any suitably supportive material and then coated with a release coating in order to provide the first release surface.
  • Suitable release coatings include, but are not limited to, silicone and fluorocarbon polymers.
  • the release surface of the production tool may be smooth or may include a structured surface such as a micro- or macro-replicated pattern.
  • the surface may include any suitable structured surface, patterned or unpatterned. Suitable structured surfaces include, but are not limited to, wells, pockets, ridges, channels and the like. Any structure of the surface will be the negative image of the structured surface desired on the article. For example, ridges on the reusable surface will manifest as channels in a surface of the article.
  • a porous mold is created.
  • the mold is created from a mixture of glass beads and a powdered epoxy resin.
  • the glass beads and epoxy are mixed together and placed over a male tool. Heat and pressure are applied to flow the epoxy resin and to cure it.
  • the ratio of epoxy to glass beads is selected so the resultant mold is dimensionally stable, yet porous.
  • a release film is applied to the surface of the mold (optionally with heat) and a vacuum is applied through the mold and the release sheet conforms to the mold cavity.
  • the release sheet could be a formable sheet coated with a release layer such as a silicone.
  • the PSA composition is applied to the formed release sheet in the mold.
  • the top portion of the masking article is applied to the PSA and the PSA is cured via a thermal process or by actinic radiation.
  • the viscoelastic material which makes up the body portion of the masking article is partially cured while in contact with the first release surface and subsequently brought into contact with a sheet of material comprising the top portion of the masking article.
  • the body portion may then be fully cured.
  • the sheet of material may be transparent or translucent. This method of assembly as advantageous as the partially cured material is tacky and promotes adhesion between the viscoelastic material and the sheet of material comprising the top portion of the masking article. In this way, an additional adhesive need not be used to adhere the sheet of material comprising the top portion of the masking article to the body portions.
  • the sheet of material comprising the top portion of the masking article acts as a second release surface.
  • the first release surface (or production tool) has a surface energy that is lower than the surface energy of the second release surface. The cured composition will, therefore, preferentially adhere to the sheet of material when the sheet of material is separated from the first release surface.
  • the curable composition may be cured by an energy source using any suitable curing means including, but not limited to, heat, infrared, ultraviolet, visible or electron beam radiation.
  • Infrared radiation refers to non-particulate radiation having a wavelength within the range of about 800 nanometers to about 3 millimeters.
  • Ultraviolet radiation refers to non-particulate radiation having a wavelength within the range of about 200 to about 400 nanometers.
  • Visible radiation refers to non-particulate radiation having a wavelength within the range of about 400 to about 800 nanometers.
  • Electron beam radiation has a dosage within the range of about 0.1 to about 10 Mrad.
  • the rate of curing at a given level of radiation may vary according to the transmissive properties of the material comprising the top portion of the masking article as well as the density, temperature, and nature of the curable composition. It may be possible to control curing so that the surface of the curable composition that is in contact with the material comprising the top portion of the masking article is cured to a greater extent than the curable composition that is in contact with the production tool. Such control of curing may provide the cured composition with release characteristics desirable for a particular application because, generally, a partially cured composition may be more easily removed from a release surface than a completely cured composition.
  • FIG. 4 several masking articles 20 are shown in perspective view as they might emerge from a first release surface of a production tool, with adjacent top portions 14 of each article attached via perforations 16 or other means known in the art. In use, one or more strips of the masking material may be held together via perforations or other means 16 in order to ensure proper alignment on the article to be masked.
  • masking articles may be provided as depicted in FIG. 11 with individual masking articles 10 held together by a pre-mask tape 52.
  • the pre-mask tape is a material with very low adhesion such that when the body portions of the masking articles are adhered to a substrate, the pre-mask tape is easily removed.
  • the sheet of material 15 is laminated onto a surface of segments of material making up the body portions 12. Ideally the segments of material making up the body portions 12 are partially cured when they are brought into contact with the sheet of material 15. Once the sheet of material 15 is laminated onto the segments of material making up the body portions 12 of the masking articles, the body portions are fully cured. Upon curing, the body portions 12 of the masking article are adhered to the sheet of material 15. At this point, the sheet of material 15 may be cut or scored along lines 16 to produce individual masking articles 10 with top portions 14 and body portions 12. Alternatively, the sheet of material 15 may be cut such that two or more body portions 12 are held together.
  • the present disclosure is also directed to a method of masking a substrate having a surface to be masked and a surface to be treated or painted.
  • a substrate 28 is shown, having a surface to be masked 27 and a surface to be treated 29.
  • Several masking articles 10a, 10b, and 10c are shown in side view with body portions 12 adhered to the surface of the substrate to be masked 27.
  • the top portions 14 of the masking articles 10a, 10b, and 10c are held together via perforations 16, lines of weakness, or other suitable means known in the art.
  • a first layer of paint or other treatment 22 is applied to the surface of the substrate to be treated 29.
  • the first layer of treatment is a primer or sealant material. When applied, the first treatment layer 22 penetrates into the leading edge of the body portion 12 of the first masking article 10a.
  • the first 22 and subsequent treatment layers (24, 26) may be dried, as appropriate, before applying the next layer.
  • the first masking article 10a is removed along the first line of perforation 16 (or line of weakness) connecting masking articles 10a and 10b.
  • the second treatment layer 24 is applied to the substrate 28 over the first treatment layer 22.
  • the second treatment layer 24 penetrates into the leading edge of the body portion 12 of the second masking article 10b, thus completely covering the first treatment layer 22.
  • the second treatment layer 24 is a paint material.
  • the second masking article 10b is removed along a second line of perforation 16 (or line of weakness) connecting masking articles 10b and 10c.
  • the third treatment layer 26 is applied to the substrate over the second treatment layer 24.
  • the third treatment layer 26 penetrates into the leading edge of the body portion 12 of the second masking article 10c, thus completely covering the second treatment layer 24.
  • the third treatment layer 24 is a clear coat material.
  • any number of treatment layers may be applied to a substrate according to the method described herein, using one or more masking articles placed in parallel, which are sequentially removed after each treatment layer is applied.
  • FIGs. 8 and 9 depict individual masking articles 10e and 10d, which are provided with top portions 14 unattached, applied to a substrate 28.
  • Masking articles thus provided may be used in the same manner as articles connected via lines of weakness or perforations.
  • masking articles could be provided as shown in FIG. 11 , with several masking articles 10 held together by a pre-mask tape which would allow the user to position the masking articles on the substrate. Once the pre-mask is removed, the individual masking articles may be easily removed from the substrate.
  • FIG. 10 shows masking article 10 applied to a substrate 28, along with a further masking article 35.
  • the additional masking article 35 may assist in preventing paint or other treatments from coating the substrate beyond areas to be treated.
  • a silicone casting tool was prepared as follows.
  • SIL1 was applied to the printing plate at 20°C, smoothed out using a spatula and degassed by placing the assembly in a vacuum chamber for 10 minutes. Edge dams were used to prevent lateral flow of SIL1 beyond the printing plate.
  • the assembly was then removed from the vacuum chamber and the silicone was allowed to cure at 20°C for 24 hours.
  • the resulting silicone casting tool was removed from the printing plate, dipped into a release coating of SIL2, excess release coating was shaken off, after which the casting tool dried in an oven set to 250°F (121°C) for 3 minutes
  • a 96/4 by weight mixture of MON1/MON2 containing 0.04% by weight PI1 was degassed with a stream of nitrogen, then partially cured at 20°C to a viscosity of 4100 cps (4.1 Pascal.sec), using a blacklight, type "F20T8 350 BLB", obtained from Osram Sylvania Company, Danvers, Massachusetts.
  • An additional 0.16% by weight PI1 and 0.15% by weight PI2 were added, mixed by hand until homogeneous, and the partially cured composition was applied to the surface of the silicone casting tool.
  • a sheet of PPF1 was then laid, smooth side down, over the partially cured composition.
  • a squeegee was applied over the film to spread the partially cured composition, remove air bubbles and to force the partially cured composition into the silicone casting tool.
  • a 5mm thick quartz glass plate then was placed over the PPF1 and the composition was exposed to two blacklights, type "F15T8BL" from General Electric Company, Louisville, Kentucky, for 20 minutes at a distance of 5 cm.
  • the resultant gelled adhesive, along with the supporting film, was removed from the silicone casting tool and was further cured by exposing, adhesive side up, in a nitrogen purged chamber, under the same blacklight conditions.
  • the resulting cast adhesive was slit between the adhesive bands, into individual elongate strips, the strips were then spliced together and wound into a roll on a 3-inch (7.6 cm) core.
  • the microreplicated surface of the supporting polypropylene film thus functioned as a release surface.
  • a sheet of cast adhesive was made according to the method described in Example 1, except that, prior to splicing, a premask tape, commercially available under the trade designation "SCPA Premasking Tape” from 3M Company, St. Paul, Minnesota, was laminated, to the back side of the slit strips of cast adhesive. Whilst still in register, the premask tape was then slit between every third strip of the underlying cast adhesive. The three-strip masking material was applied to the inside of a vertically positioned cold rolled steel door jamb test panel, obtained from ACT Laboratories, Hillsdale, Michigan, and the premask tape was removed.
  • SCPA Premasking Tape commercially available under the trade designation "SCPA Premasking Tape” from 3M Company, St. Paul, Minnesota
  • a sealer "Deltron NCS 2004 Gray Sealer", obtained from PPG Industries, Pittsburgh, Pennsylvania, was sprayed into the door jamb test panel and allowed to dry for 30 minutes.
  • the first elongate strip was removed and two layers of basecoat, "Deltron DBU Pewter Basecoat”, obtained from PPG Industries, were sprayed into the door jamb panel, 10 minutes apart, and allowed to dry for 15 minutes.
  • a clearcoat "Concept DCU 2021 Clearcoat”, also obtained from PPG Industries, was then sprayed into the door jamb panel and allowed to dry for 15 minutes.
  • the second elongate strip was removed and a second layer of the clearcoat was sprayed into the door jamb panel. The panel was allowed to dry for 2 hours, after which the third elongate strip was removed to reveal a smooth, feathered, painted door jamb.
  • a roll of cast adhesive was made according to the method described in Example 1, except the support film PPF1 was replaced with PEF1.
  • a roll of cast adhesive was made according to the method described in Example 1, except the trapezoidal profile of the flexographic printing plate was replaced with an aluminum plate machined with grooves of a cylindrical cross-section defined by a 1/16-inch (1.6 mm) radius and a chord 40 mil (1.02 mm) from the edge of the cylinder on 3/16 inch (4.8 mm) centers.
  • An intermediate replication step with a cast urethane Durothane S-800, from Synair, Chattanooga, TN was required to get the appropriate surface topography on the silicone casting tool.
  • Three strips of this material were used as masking tape according to the method described in Example 2, resulting in a smooth, feathered painted door jamb.
  • a roll of cast adhesive was made according to the method described in Example 4, except the cylindrical cross-section had a radius of 1/8-inch (3.2 mm) and no land area between sections (chords). Three strips of this material were used as masking tape according to the method described in Example 2, resulting in a smooth, feathered painted door jamb.
  • a roll of cast adhesive was made according to the method described in Example 1, except that, using a shear blade type mixer, 0.5% by weight of PEM1 was dispersed into the partially cured composition before applying it to the silicone casting tool.
  • the partially cured composition was subjected to vacuum in a desiccator to remove entrained air before it was applied to the silicone casting tool.
  • Sheets of cast adhesive were made according to the method described in Example 1, except the backside of the polypropylene film was corona treated using a hand-held wand, model "Dyna-A-Mite” from Enercon Industries Corporation, Menomonee Falls, Wisconsin. Two sheets of cast adhesive strips were stacked between two flat plates and weighted at 50grams/cm 2 for 4 weeks at 20°C. Following this simulated storage regimen the two layers of cast adhesive were readily peeled apart.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP06750543A 2005-04-22 2006-04-17 Masking article and method of masking a substrate to be coated Active EP1871541B1 (en)

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Application Number Priority Date Filing Date Title
PL06750543T PL1871541T3 (pl) 2005-04-22 2006-04-17 Produkt do maskowania i sposób maskowania podłoża do powleczenia

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US67383005P 2005-04-22 2005-04-22
PCT/US2006/014536 WO2006115900A1 (en) 2005-04-22 2006-04-17 Masking article and method of masking a substrate to be coated

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EP1871541A1 EP1871541A1 (en) 2008-01-02
EP1871541B1 true EP1871541B1 (en) 2011-05-25

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US (1) US8399058B2 (zh)
EP (1) EP1871541B1 (zh)
JP (1) JP2008538590A (zh)
KR (1) KR20080003437A (zh)
CN (1) CN101198414A (zh)
AT (1) ATE510629T1 (zh)
AU (1) AU2006240222A1 (zh)
BR (1) BRPI0609989A2 (zh)
CA (1) CA2605519A1 (zh)
ES (1) ES2366803T3 (zh)
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AU2006240222A1 (en) 2006-11-02
EP1871541A1 (en) 2008-01-02
BRPI0609989A2 (pt) 2011-10-18
ATE510629T1 (de) 2011-06-15
PL1871541T3 (pl) 2011-09-30
JP2008538590A (ja) 2008-10-30
ES2366803T3 (es) 2011-10-25
US8399058B2 (en) 2013-03-19
US20080248203A1 (en) 2008-10-09
KR20080003437A (ko) 2008-01-07
WO2006115900A1 (en) 2006-11-02
CA2605519A1 (en) 2006-11-02
CN101198414A (zh) 2008-06-11

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